Lathe attachment.



RNE. GARRETT. LATHB ATTACHMENT. APPLIOATION FILED MAY 16, 1911.

l 024,254 Patented Apr. 23, 1.912.

2 SHEETB-BHEET l.

R.' E. Mumia LATHE ATTACHMENT. APPLIGATIQN FILED MAY 16, 1911.

Patented Apr. 23, 1912.

2 SHEETS-SHEET 2.

controlled .by the feed screw 19 inthe well attachment.' Fig. 2

`had previously been removed.` Y ,The base-12 is provided with themain UNITED STATE@ TATNT FFTH.

Specication of Letters Patent. Appiieation vsied May is, 191i.

known manner, a stop 20 is clamped to the main frame and is` Patented Apr. 23, 1912.

Serial No. 627,591.

To all lwhom if may concern.' v i Be it known that I, ROBERT E. GARRETT, a citizen of the United States, residing at in the county of Davidson-and Tennessee, have inventedcertain new and useful Improvementsin Lathe Ati tachi'nents, of which theifollowing is a specihe drawings.

iication. 3, having graduations 24, is secured by i My invention relates to an improved bolts 25 to a similar flange 26, provided on lathe attachment, Wherebya variety of Work the slide, said bolts 25. being mounted in can e correctly and expeditiously pertheV flange 26 and the 'ange 23 being proiornied, Without special machines for the` vided with slots through which said bolts purpose, and has for itsobject, to provide a extend, provides means whereby the swivel device adapted to bey secured in place of headmay be set to cut a spur gear as shown the tool post -o an ordinary `lathe vwhich in Fig.l 1,7or for cutting a bevel of any dewill lprovide means for cutting either spur, sired angle as well as at 90 degrees from bevelk or face gears, as wellas worin wheels, the position sliown`t`or cutting a face ear. and is also. especially provided with means i ounted to rotate in a bearing 27 in the for cutting keyways in shafts; theseand swivel 22 is a spindle 28, provided with a numerous other benefits inav be gained in central .openinof 29 in which a stub mandrel more particularly described hereinafter. 1e opening 29 and secured therein by nut -eference being had to the drawings in `32, said stub mandrel'BO is further provided which similar numerals indicate correspond#` with the portion 33 on which the blank 34 ing parts in the figures of the drawings: is mounted, said bl'an t being secured on the Figure `l is an elevation of my improved stub mandrel by a nut not shown.

is a. plan view of the spindle 28 is providedat one end with a same. Fig. 3 is a partialv end view. Worm Wheel 35, secured by `an externally 4 is a plan view of the swivel head, showing threaded nut 36 and a back nut 37 encircling the attachment in use for cutting a key way `the same. i ina shaft. ig. 5 is a view similar to Fig. Ashaft 38 mounted in bearings 39 se- 3 in which a back rest is shown in place. cured to the swivel head is provided with a By reference to Figs.V 1 and 2 it` will be 0 in mesh with the worm wheel 35, seen the, ordinar 1 carriage 1, provided with a gear wheel- 41 removably mounted on the the slide rest 2, and feed screw 3, as Well upper end of shaft 38 is designed to mesh as the face plate 4, the live center 5, the dead h a pinion r42 mounted on a center 6. the cutter 7, the cutter arbor 8, said block being mounted for adjustment in and the dog 9 are shown in dots and are of a T slot 43, provided in the upper face of the ordinary construction, common to allA the swivel head 22. A T bolt 44 secures the lathes .and form no part of this block43 in any desired position, which provides for themcshing ot' said gears 41 and invention. The attachment is provided less teeth than the attachment is now set for. Secured to the pinion 42 on the stub shaft 45 `and secured thereon by `nut is a spring steel crank 46, aving at its 'outer end a depending lugv 47,

lengage, a depression in the lan upstanding lug48 on the k 43, which provides for retaining said crank in posi tion after it. has b given a revolution to feed the blank upv the distance ot: one tooth.

b-base and is protiange .13, corresponding with a..tiange 14 on thesiib-base, Whichis p vided with graduations `as shown v,at"15, whereby the attachmentmay be set to cut a worm gearat. any desired .anglerequired,y said parts are secured rmly in place by headedbolt 16, located in tihe-Tislot usually occupied byfthe ordinary toolapostrwhich frame17,on which is mounted the slide as lthe blank at its upper shaped slot 5.5, which tatable spindle provided with a central o ning mounted in sa'd swivel head, a ro tatable mandrel having a shank secured in said opening, means carried by said mandrel for supporting a blank, a worm wheel on said spindle, a shaft upon said swivel head arranged at right angles to said spindle, thereon meshing with said worm wheel on said spindle, and means carried by said shaft for rotating said mandrel.

4. In a lathe attachment, a base provided with a slide rest, a iiange on the slide rest, a swivel head having a graduated flange secured to said flange on the slide rest, a rothe T slot 43 is a V by reference to Fi 1 and 4 is provided for the reception o a piece of shafting 50, in which a key way is to be cut, said shafting as shown is clampe in position by the straps 51, having T bolts in the said s ots 49 and 43, as Vwill be seen the block 43 and gear 41 having previously been remove A further object of the T slot 49 is to provide means for securing a back rest 52 shown in Fig. 5, in position to' support edge in case it is thin and is inclined to give when broight in consaid T slot 49, and

tact with the'millin to l 7. tatable spindle mounted in said swivel head, 80 The operation o the attachment is exa rotatable mandrel mounted therein,means trernely simple and accurate, it can be carried by said mandrel for supporting a quickly applied in place of the usual tool blank, a worm wheel on said spindle, a s aft st and can be set o cut any desired numupon said swivel head a wcrrn thereon 'r of teeth in a blank by simply changingv meshin with said worm wheel on said g5 the gear 41 to suit the work, it also provides spindle, a removably mounted gear whee means for performing a number of diifersecured upon sai shaft, an adgustable block ent operations on the one attachment which mounted upon said swivel head, a pinion will obvio sly be a great saving of time. carried thereby meshing with said remov- Having y described my invention what able gear wheel, and means for adjusting I desire to claim and secure by Letters Patand retaining said block with reference to ent is: said swivel head and gears.

1. In a lathe attachment, the combination 5. A lathe attachment, ct-.nprising a base, with a main frame, of a slide rest carried a swivel head adjustably secured in SaidI thereby, means for limiting the u ward base for movement transversely of its axis, movement of the slide rest, a-swive head a mandrel adapted to support a blanky and adjustably secured upon said ame, a ro. mounted to rotate in said head, a gear upon tatable spindle on the head and provided said mandrel, a worm shaft meshing with with a central opening, a rotatable mandrel said gear, a gear secured to said worm shaft, having a shank removably secured in said an adjustable block mounted upon the swivel opening, means carried by said mandrel for head, a crank shaft carried by said block supportin a blank, a worm wheel carried and having a pinion meshin with said gear," by one en of the spindle, a shaft vertically and means for retaining sai crank shaft in disposed at right angles to the spindle and fixed position, said means comprising a decarrying a worm at its lower end meshing pending lug carried by the crank and an upwith the said worm wheel on the spindle a standing lug formed on the adjustable block removably mounted gear wheel carried by and having a depression adapted to be enthe upper end* of said shaft, an adjustable ga ed by the depending lug.

block slidably mounted on the swivel head, 6. A lathe attachment, comprising a base, a pinion carried thereby meshin with the a swivel head adjustably secured in saidbase removablymounted gear wheel o the vertifor movement transversely of its axis, said cal shaft, meansfor adjusting and retaining head having a T slot in its upper ace, a said block in position, a stub shaft secure mandrel adapted to support a blank and to the said pinion and in Acoaxial alinement mounted to rotate in said head, a ar upon with the vertical shaft, a crank carried said mandrel, a worm shaft mes ing with 111 thereby, and means for retaining said crank said gear, a gear secured to said worm in position after it has been given a revolushaft, a crank shaft ha 'ng a pinion mesh tion. in with said ear, a slide -block carrying 2. In a lathe attachment, a base provided said crankshat, and a T bolt for ad]ust with a main frame, a slide rest moun ably securin said slide block in the T slot 12 thereon, means for' controlling the forward of the swive head. movement of said slide rest, a stop carried 7. In a lathe attachment, a base rovided bly the main frame .immediately above the with a slide rest, a ange on the s ide rest, side rest, and a stop screw for a jlilistably a swivel head having a graduated tlangeselimiting the upward movement of t e slide cured to said flange on the slide rest, a ro- 1I rest to provide for a uniform epth of cut tatable spindle mounted in said swivel head,

3. In a lathe attachment, a base rovided a rotatable mandrel mounted therein, means with a slide rest, a flange on the side rest, carried by said mandrel for supporting a a swivel head having a graduated flange seblank, a worm wheel on said spindle, a sha cured to said :ange on the slide rest, a ro upon said swivel 3 head, a worm thereon meshing wlth said worm wheel on said ing a depression adapted to be engaged by 10 spindle, a removably mounted gear wheel said depending lug. secured upon said shaft, an adjustable block In testimony whereof I aix my signature mounted upon said swivel head, a pinion in presence of two witnesses.

carried thereby meshin with said removable gear wheel, a cran secured upon t-he l ROBERT E GARRETT shaftcarrying the inion, a depending lug Witnesses: on the outer end o the crank, and an up- J. T. PITT,

standing lug formed on said block and hav- EDGAR DRAKE. 

